<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <script src="../js/react.development.js"></script>
    <script src="../js/react-dom.development.js"></script>
    <script src="../js/babel.min.js"></script>
  </head>
  <body>
    <div id="test"></div>

    <script type="text/babel">
      class Demo extends React.Component {
        componentWillMount() {
          console.log("****componentWillMount");
        }

        render() {
          console.log("****render执行****");
          return (
            <div>
              <h2></h2>
              <button onClick={this.unMount}>卸载</button>
            </div>
          );
        }

        componentDidMount() {
          console.log("****componentDidMount****");
        }

        componentWillUnmount() {
          console.log("****componentWillUnmount****");
        }
        unMount = () => {
          ReactDOM.unmountComponentAtNode(document.getElementById("test"));
        };
      }

      ReactDOM.render(<Demo />, document.getElementById("test"));
    </script>
  </body>
</html>
